VSWR Meter

VOLTAGE STANDING WAVE RATIO (VSWR) METERES
It is a high gain, voltage, amplifier tuned at the centre frequency of 1khz. it is used for measuring VSWR , attenuation and total mismatch on the line .
SPECIFICATION OF VSWR, MODEL SW-115
Sensitivity
0.2μV at a 200 ohms input for full scale deflection
Noise Level
At least 5 dB below full scale at rated sensitivity and maximum band width input terminated in 100 ohms and 500 ohms for crystal low and high respectively .
Calibration
Square law, meter indicates SWR, dB
Range
70 dB, input attenuator provides 60 dB in 10 dB steps, accuracy + 0.2 dB per 10 dB steps Maximum commutative error + 0.5 dB
Scale selector
Normal Expand and – 5dB
Meter Scale
SWR1-4,SWR 3-10 , expand SWR 1.1.3, dB 0-10, expand dB0.2
Gain Control
Adjust the reference level, variable range 0-10 dB approx.
Input
“Bolo” bias provided for 4.3 mA low current bolo meters
Recorder output
Socket provided for recording having 1 V for full scale deflection, internal resistance of 1000 ohms or less
AC Output
BNC connector for amplified output
Input connector
BNC (F)
Frequency
1000Hz + 10%
Power
230 volts A.C + 50 Hz, mains supply